[for the devil] or [heck] or [the hell of it] {adv. […]

[for the most part] {adv. phr.} In general; mostly; most of […]

[for the sake of] or [for one's sake] {adv. phr.} On […]

[for the time being] also {literary} [for the nonce] {adv. phr.} […]

[for the worse] {adj. phr.} or {adv. phr.} For something that […]

[forever and a day] {adv. phr.}, {informal} For a seemingly endless […]

[forever and ever] {adv. phr.} Forever; always. - Used for emphasis, […]

[from hand to hand] {adv. phr.} From one person to another […]

[from mouth to mouth] {adv. phr.} See: [BY WORD OF MOUTH].

[from pillar to post] {adv. phr.} From one place to another […]